I had an old Civic that was on its last legs.
I took it to a Jiffy Lube to get the oil changed as I was busy with work and didn't have the time to do it myself.
The guy I was dealing with was obnoxious, initially refusing to change the oil unless I let them fix "all the oil leaks" on it. It was weeping in a few places but not badly enough to leave any oil on the ground (maybe a drop if parked overnight somewhere) and the car wasn't worth putting any money into.
Anyway, I finally convinced the guy to change the oil for me and he started trying to upsell me on everything, just really obnoxiously, not taking no for an answer, repeatedly asking, saying all sorts of bad things would happen if I didn't buy all their money-wasters.
When they'd finished changing the oil he was under the car in the pit and asked me to turn it on and rev it slightly to make sure the oil filter wasn't leaking.
I took it to redline and heard him squeal.
That was satisfying.